KR870000861B1 - Granulating and coating machine - Google Patents

Abstract

Machine which is also for enrobing the granules comprises a chamber in which granulation takes places, the raw material being suspended in a fluidised bed while being sprayed with a liq. binder. The base of the chamber is formed by a horizoantal disc which is rotatable about its central vertical axis. At least part of the disc area is perforated for the passage of fluidising air. The disc is vertically adjustable to vary an annular gap between the circumference of the disc and an annular seating onto which the disc can be lowered to reduce the gap to zero. Fluidising air supply can be controlled independently to the disc perforations and to the annular gap between disc and seating.

Description

Assembly Coating Equipment

Figure 1 is a side cross-sectional view showing an embodiment of the assembly coating apparatus of the present invention.

Figure 2 is a cross-sectional view showing one embodiment of a rotating disk and a stirrer of the assembly coating apparatus of the present invention.

3 is a perspective view of one embodiment of a rotating disk of the present invention.

4 is a perspective view showing one embodiment of the stirrer of the present invention.

Figure 5 is a cross-sectional view showing another embodiment of the rotating disk and the stirrer of the assembly coating apparatus of the present invention.

6 to 9 are perspective views showing various embodiments of the stirrer.

Figure 10 is a side cross-sectional view showing another embodiment of the assembly coating apparatus according to the present invention.

11 is a cross-sectional view showing an embodiment of a rotating disk and a stirrer of the assembly coating apparatus of FIG.

12 is a schematic view showing one embodiment of a slot of the slit adjustment device.

13 is a perspective view of one embodiment of a grinder;

14 and 15 are vertical cross-sectional view and horizontal cross-sectional view showing the assembly coating action of the assembly coating apparatus of FIGS.

FIG. 16 is a schematic diagram showing another embodiment of a slot of the slit adjustment device. FIG.

17 is a schematic view showing another embodiment of a slot in the slit adjustment device.

*. Explanation of symbols for main parts of the drawings

1: assembly case 2: suit

3: discharge chute 5: rotating disc

6 agitator 7 rotation shaft

8: drive motor 10: bearing

14,15: lifting device 16: slits

17: annular ring 18: vent

19,20: annular partition 21,22: sealing ring

24,25 gas passage 26 supply fan

27 supply conduit 28 filter

29 heat exchanger 31 slit gas passage

32: ventilation gas passage 33, 34: control valve

36: stirring blade 38: grinder

42: fluid tank 43, 44: pump

45,46: injection nozzle 47: nozzle

48: exhaust conduit 53: bag filter

57: linear baffle 59: scraper

60: slit adjustment device 61: slot

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granulation coating apparatus, and more particularly, to a granulation coating apparatus capable of granulating, coating, mixing and drying raw materials in granule and powder form with high productivity.

Assembly is one of the most used processes in the production of pharmaceuticals, but it has been treated as the most difficult process. While many attempts and developments have been made in this assembly process in the prior art, each unit process requires a different unit of equipment. Of course, each unit process requires skilled workers. Therefore, the conventional assembly process is low in productivity, technically difficult and unsuitable for GMP (Good Manufacturing practice).

About 10 years ago, assembly methods using flow needles were developed in a very new way. These devices include mixing and drying processes but exclude the processes of wetting / doughing, cutting and rocking. Therefore, a new fluidized bed granulator with one device was needed. This is suitable for GMP.

In this new device, the raw material powder is flowed by the air flow and sprayed by the binding solution. Each particle adheres to the water droplets of the solution and aggregates with each other to enlarge its size. At the same time, the aggregated particles are dried by the air stream for flow. The amount of air required for the flow is much higher than that for drying, so that the larger particles are dried almost instantaneously.

Although fluid bed assembly is considered to be the perfect method, it has major disadvantages in terms of technology and production of the product. Since the flow is only in the balance between the buoyancy of the air and the gravity of the particles, this balance is easily broken if the size shape and weight of the particles change during the flow. This is the most fundamental difficulty in flow bed assembly.

Furthermore, the concentration of particles should be lowered to prevent particle interaction and to maintain good flow. However, the space required for the flow assembly method is very small. In terms of the properties of large particles obtained in this way, the particles are large, coarse and fragile due to the lack of dough and fluctuations.

In the prior art, various types of apparatus for assembling, coating, mixing and drying granules and powdery raw materials for use in the fields of medicine, food, powder metals, catalysts, ferrites, ceramics, detergents, cosmetics, dyes, pigments and toners Was developed.

One example of a prior art device is a device having a net and a rotating blade mounted on the bottom of the assembly case. However, this conventional apparatus is not suitable as an assembly coating apparatus because the granular material is collapsed by the rotary blade and the mesh, so that it is impossible to obtain a spherical product and the broken coating is broken.

Another conventional apparatus is disclosed in Japanese Patent Laid-Open Nos. 54-6297 and 56-133024, which includes a device having a rotating disk on a mesh installed at the bottom of an assembly case. Such a device may be used as an assembly coating device, but since the granulation material is sandwiched between the rotating disk and the mesh, friction with the mesh occurs when the rotating disk is rotated, so that the particles collapse. In addition, there is a disadvantage that the powder raw material leaks through the net. And because the bulk density of the granular material can not be adjusted, only heavy products with irregular particle sizes are assembled. In addition, the conventional apparatus suffers from the disadvantage of low productivity.

According to Japanese Patent Laid-Open Nos. 46-22544 and 47-47794, the bottom of the casing is formed by the rotating disk, and the rotation of the rotating disk and the air supplied through the slit formed between the outer periphery of the rotating disk and the inner wall of the case. There is shown a coating apparatus in which coating is performed by centrifugal oscillation. Such a conventional apparatus is mainly a coating apparatus, and when used in an assembly process, its productivity is low due to low drying capacity and clogging of particles. Therefore, this prior art is not suitable for mass production, and only heavy round products are produced, but light weights are not produced.

An object of the present invention is to provide an assembly coating apparatus that can adjust the bulk density and hardness and particle size of the granulated product, and can produce a high quality granulated product with high productivity without easily causing particle separation and particle breakdown.

Another object of the present invention is to provide an assembly coating apparatus that can adjust the slit width as a simple, low cost and easy operation.

According to the above object, the assembly coating apparatus of the present invention independently regulates the gas flow through the vent formed in the rotor for the assembly coating and the slit air flow through the slit formed between the outer periphery of the rotor and the inner wall of the assembly case And a gas flow rate control device, which is capable of performing assembly, coating, mixing and drying operations under optimum conditions at all times by controlling two gas streams independently.

According to another feature of the invention, the slit width is adjusted by the vertical vertical movement of the rotor or the annular slot forming apparatus. Vertical movement of the slit forming apparatus can be easily performed by the operation of the slit adjusting device.

In addition, the assembly coating apparatus according to the present invention is provided with a stirrer on the rotor, by stirring the assembled or coated material by rotating the stirrer independently of the direction and speed of the rotor. In addition, a grinder is installed on the rotor to grind large sized granulated coated material.

Referring to the features and advantages of the present invention in detail with the accompanying drawings as follows.

1 is a vertical cross-sectional view showing one embodiment of the assembly coating apparatus of the present invention.

The assembly coating apparatus of this embodiment has a case (1) for flowing, assembling or coating the powder or granule material charged in the case (1). The case 1 is installed vertically and is cylindrical. The side wall of the case 1 is provided with the chute 2 inclined outward at its intermediate height so as to supply the material to be assembled and coated. On the lower sidewall of the case 1 there is a discharge chute 3 to discharge the assembly coated product, and a discharge valve 4 for opening and closing the discharge chute is provided.

A rotor or a rotating disk 5 is provided at the same height as the discharge chute 3 inside the bottom of the case 1, and the powder or granule material is rocked and moved outwardly by rotating horizontally in the case 1. A stirrer 5 for mixing and accelerating the powder or granule material to be assembled or coated is provided on the rotating disk 5 rotating on a horizontal plane.

The rotary disk 5 is rotated by driving the rotary shaft 7 installed in the center of the assembly case 1 in the required direction through the belt 9 in the variable speed drive motor 8. The stirrer 6 is rotated from the other transmission drive motor 12 through the belt 13 to rotate the rotary shaft 11, which is coaxially inserted into the hollow rotary shaft 7 and supported by the bearing 10, from the rotating disk 5. Rotates independently in direction and speed.

The rotary disk 5 and the stirrer 6 each independently move vertically by different lifting devices 14 and 15. Such lifting devices 14 and 15 may be configured, for example, in the form of worms and racks.

The lifting device 14 can adjust the width or the gap of the slit 16 between the outer periphery of the rotating disk 5 and the inner wall of the case 1, for example, by moving the rotating disk 5 up and down to zero. By adjusting the slit width within the range of 10 to 10 mm, by controlling the flow rate (heated or cooled) of slit air supplied into the case 1 through the slit 16 at the bottom of the rotating disk 5, it is always assembled and coated Maintain optimal conditions for each step of the job.

As shown in detail in FIG. 2, an annular ring 17 having a triangular cross section is provided on the inner wall of the case 1 adjacent to the outer circumference of the rotating disk 5 to adjust the flow rate of the slit gas. The slit width formed between the outer periphery of the rotating disk 5 and the upper slit forming surface 17a of the annular ring 17 is adjusted in accordance with the vertical movement of the rotating disk 5 by the elevating device 14. Alternatively, the slit width may be adjusted by changing the vertical position of the annular ring 17 itself.

As shown in FIG. 3, the rotating disk 5 of the apparatus has a vent 18 made of a perforated plate ring at a slightly outer peripheral position at the radial middle portion. The vent 18 is made of a sintered plate with a small number of pores so that powder or granular material cannot pass through the pores. The position of the vent 18 is preferably located outward from the radial middle portion of the rotating disk 5 to sufficiently promote centrifugal rocking action of the powder or granular material on the rotating disk 5. The ventilation part 18 does not necessarily need to be installed in the circumferential direction. For example, the vent may be provided at a position on the rotating disk such as a radial notch.

The purpose of constructing the ventilator 18 is, for example, to induce heating or cooling air from the lower part of the rotating disk 5 through the ventilator 18 into the case 1 so that segregation is low and a wide range of bulk density is achieved. In order to effectively produce a high quality assembly or coating product, including a flow form of powder or granular material, which is different from the flow form generated by the slit gas supplied through the slit 16, is generated in the case 1. The gas flow through the vent 18 is independent of the slit gas flow through the slit 16.

In order to obtain these two gas flows, annular partitions 19 and 20 are provided on the bottom wall 23. Maze-type seal rings 21 and 22 are installed at the upper ends of the partitions 19 and 20, and the seal rings 21 and 22 are inserted into grooves formed in the lower surface of the rotating disk 5. The gas passage 24 for the slit gas supplied to the case 1 through the slit 16 by the partitions 19 and 20, and the gas supplied to the case 1 through the vent 18. Gas passages 25 for each are formed and the gas passages 24 and 25 are separated from each other to form different gas supply lines.

Initially, both the slit gas through the slit 16 and the gas passing through the vent 18 are supplied from the supply fan 26 of FIG. 1, purified through the filter 28 of the supply conduit 27, and then heat exchanged. It is heated or cooled to a suitable temperature by means of the group 29 and then supplied to the bottom of the supply conduit 27. The gas supply line extending from the lower portion of the supply conduit 27 to the bottom of the case 1 is separated by the partition 30 connected to the annular partition 20 of the gas passages 24 and 25, and thus the slit gas passage 31. And a ventilation gas passage 32 leading to the ventilation portion 18. Each of the slit gas passage 31 and the ventilation gas passage 32 communicates with the gas passages 24 and 25, respectively, to form two independent slit gas supply lines, one of which leads to the slit 16 and the other to It is connected to the vent 18.

Adjacent to the inlet of each gas passage 31, 32, an adjustment valve 33 or damper for adjusting the flow rate of the slit gas supplied to the slit 16, and an adjustment for adjusting the gas flow rate supplied to the ventilator 18. The valve 34 is provided. By independently regulating the flow rate regulating valves 33 and 34, various forms of circulation are obtained by the two flows supplied to the case 1 along the slit 16 and the vent 18.

As shown in FIG. 4, the stirrer 6 of the present embodiment is provided with three stirring blades 36 on the side of the boss 35. Each stirring blade 36 is long and curved toenail-shaped, extending at intervals of 120 ° to increase the mixing and assembly effect.

As shown by the dashed line in FIG. 2, the stirrer 6 is designed to inject cleaning gas supplied through the gas passage 37 formed on the rotary shaft 11 from the lower side of the boss 35, so that it can be powdered or assembled. The material is prevented from entering into the gap formed between the rotating shaft 11 and the rotating disk 5.

Two injection nozzles 45, 46 are provided on the side wall of the case 1, above the stirrer 6 with respect to the center of the case 1 and near the bottom just above the stirrer 6, which are each pump 43. 43 is a two-fluid form for spraying the coating or binder solution supplied from the liquid tank 42.

On the other hand, the nozzle 47 is installed on the side wall of the case 1 directly above the injection nozzle 45 to supply powder or granulated material to the flow or assembly needle of the case (1).

In addition, a jet nozzle 54 and a bag filter 53 for intermittently releasing materials and dust collected by the bag filter 53 by applying a pulse jet of a high pressure gas to the upper end of the case 1 are provided. do. An exhaust conduit 48 for exhausting the exhaust air out of the system through the bag filter 53 from the flow bed assembly chamber is connected to the upper side of the case 1. The cover 49 for the explosion exhaust is hinged to the upper wall of the case 1. The bag filter 53 and the jet nozzle 54 may be removed or a cyclone may be used instead.

The operation of this embodiment is described as follows.

First, the powder or granule material to be assembled or coated is supplied to the assembly case 1 through the chute 2 by a predetermined amount. The flow rate control valve 34 is opened to independently regulate the gas flow rate through the conduit 32 so that air from the supply fan 26 flows through the vent 18 of the rotating disk 5 to the case 1. To do that.

Lifting device to open the slit 16 formed between the outer periphery of the rotating disk 5 at the bottom of the case 1 and the inclined surface 17a of the annular ring 17 provided on the inner wall of the case 1. Adjust (14) to position the vertical position of the rotating disk 5 at a fixed height. The vertical position of the stirrer 6 is positioned at a predetermined height by adjusting the elevator 15. In this state, the motor 8 is driven to rotate the rotary disk 5, and the motor 12 is driven to rotate the stirrer.

After that, the stirrer 6 is rotated through the belt 13 and the rotating shaft 11 by the drive motor 12 in the same direction or the reverse direction as the rotational direction of the rotating disk 5 to stir the material to be assembled or coated. Let's do it. Immediately after the powder or granular material is supplied, the binder 43 or the coating solution of the fluid tank 42 is immediately sprayed to the material to be assembled or coated through the spray nozzles 45 and 46 by using the pumps 43 and 44. If necessary, a replacement or powder granulation or coating material may be supplied to the material to be assembled or coated through the nozzle 47. The exhaust gas of the case 1 is discharged out of the system through the bag filter 53 by the exhaust conduit 48. Other fans may be installed downstream to assist in gas exhaust.

In the assembly and coating apparatus of the present invention, the slit gas through the slit 16 and the gas through the vent 18 are combined, so as to be assembled or coated in addition to the combined rotational motion of the rotating disk 5 and the stirrer 6. The material to be subjected is centrifugally rocked and stirred, and is flowed in a cyclic flow in which the material rises by the gas flow and descends by gravity. Therefore, in the present embodiment, the particle movement is good, no useless space is formed, no channeling phenomenon or bubbles are generated, and the product having the optimum bulk density, hardness, and particle size is assembled and coated according to the use and purpose of the product. .

In other words, according to the present embodiment, rigid weight products can be assembled and coated at low cost and high productivity from various types of products, that is, soft and lightweight products, and satisfactory coating of pellets and crystalline powders, as well as spherical granules, is also possible. Can be.

The combined rotary motion of the rotating disk 5 and the stirrer 6 quickly and quickly discharges the assembled coating product to the discharge chute 3.

In particular, in this embodiment, the rotational direction and speed of the rotating disk 5 and the stirrer 6 and the flow rates of the two gases can be variably controlled, thereby providing high productivity as well as properties of products such as bulk density and particle size and shape thereof. A wide range of selective adjustments can be made as needed.

In the first embodiment, the rotating speed of the rotating disk 5 is low, the rotating disk 5 and the stirrer 6 rotate in the same direction, and the gas flow rate through the vent 18 of the rotating disk 5 is large. In the case where the flow rate of the slit gas through the slit 16 is low, the material to be assembled and coated is ductile having a bulk density by flowing in a flow form that rises upward in the center of (1) and descends radially outward by gravity. You can get the assembled product.

As a second example, if the stirrer 6 rotates in the same direction as the rotating disk 5 but the rotation speed of the stirrer is higher, the gas flow rate through the vent 18 is low, and the slit gas flow rate is high, the material to be assembled coated By flowing along the inner wall of the casing and flowing down to the center of the casing, a spherical rigid product having a high bulk density is obtained, and the assembling speed and its productivity are increased by the large centrifugal force of the stirrer 6.

As a third example, if the speed of the rotating disk 5 and the stirrer 6, the gas flow rate and the slit gas flow rate through the vent 18 are selected as a range between the values of the first and second examples, the volume density and Hardness can also be obtained with a product having a value in the range therebetween.

As a fourth example, in the case where the rotating disk 1 and the stirrer 6 are rotated in opposite directions, and the slit gas flow rate is high and the gas flow rate through the vent 18 is low, the material to be assembled and coated is the case 1 inner wall. It is flowed in the form of centrifugal flow pressurized on, and a rigid spherical granulated product having a high volume density can be obtained.

In addition, according to the present embodiment, since the granular coating is possible under conditions different from those selected in the above example, the present embodiment can perform various granulation or coating operations such as coagulation granulation, centrifugal oscillation granulation and mixing. have.

Also in this embodiment, it is also possible to humidify and mix the granulated or powdered material before performing the assembly or coating operation. Humidification and mixing can be performed by spraying a binder or coating liquid through the spray nozzle 46 on the granulation coating bed prior to granulation coating an amount corresponding to a few percent of the material to be granulated. At the same time, the rotary disk 5 is lowered to close the slit 16 to stop the rotation and rotate the stirrer 6 at a high speed. By this humidification and mixing, the surface of the powder or granular material is wetted, thereby accelerating the assembling coating rate to be performed next. It is also possible to reduce the amount of fine powder dispersed and lost on the granulated coating needles, so that the components of the assembled product are uniform.

Therefore, there is no need to install a bag filter in the case. Instead of the bag filter, a simple cyclone is installed on the outside of the case 1 so that the powder or granules collected in the cyclone can be recycled and assembled at a low cost and high productivity. A coating apparatus can be provided.

Also, powders or granules having a high specific gravity, for example, ceramics, metal powders or ferrites, cannot be restarted by the conventional apparatus when the fluid state is broken for any reason. In this example, however, the flow can be easily measured by simply rotating the stirrer 6 together with the rotating disk 5 in the above case.

5 is a cross-sectional view of a second embodiment of the assembly coating apparatus according to the present invention.

In this embodiment, the side wall of the case adjacent to the outer periphery of the rotating disk 5b has the inclined surface 1a which spreads upwards. Therefore, the slit 16 can be variably adjusted by allowing the rotating disk 5 b to vertically move using the elevating device 14. The stirrer 6a of this embodiment is smaller in diameter than the rotating disk 5b.

In the embodiment of FIG. 5, the combination of the rotary disk 5b and the stirrer 6a and the slit gas supplied through the slit 16 and the gas supplied through the vent 18 are excellent in high productivity. It is possible to assemble or coat the product of nature.

The side wall of the case 1 forming the slit 16 between the outer periphery of the rotating disk 5b and the side wall is widened upward in the opposite direction to the inclined surface 1a. This is the same as in the case of the annular ring 17 of the first embodiment.

6 to 9 are perspective views showing various examples of the stirrer used in the present invention.

In the example of FIG. 6, the stirrer 6a has two stirring vanes 36a extending at 180 degree intervals from the side of the boss 35. The stirring blade 36a has the vent hole 55 and the stirring plate 56 provided in the lateral direction with respect to the length of the stirring blade 36a between the said vent hole 55. As shown in FIG. In the example of FIG. 6, the stirring plate 56 is provided. The example of FIG. 6 is suitable when it is necessary to increase the gas flow rate supplied to the vent 18, and is suitable for assembling work in the case where the density of powder and granular material is high and the amount of binder solution is high. Good dehydration and drying effect can be obtained.

In the example of FIG. 7, the stirring blade 6b is provided in the upper surface, and the three linear protrusions or baffles 57 which are radially installed by 120 degree | interval mutually are provided. The stirring blade 6b is smaller than or equal in diameter to the rotating disk 5 of FIG. This example is suitable for producing spherical granules by adding a powder material and a binder solution to produce granules as core substrates, and can effectively perform rocking granulation operation.

In the example of FIG. 8, the stirring blade 6c has the disk part 58 of a slightly small radius, and the L-shaped scraper 59. As shown in FIG. The scrapers 59 are provided at intervals of 120 degrees to scrape off the powder or granular material adhering to the inner wall of the side wall of the case 1. This example is suitable for oscillating granulation operations of materials having properties that adhere to walls.

In the stirrer 6d as shown in FIG. 9, the scraper 59 is attached to the side of the boss 35b without being attached to the disk.

It is to be understood that the present invention is not limited to the above examples, and that many other variations can be readily made. For example, a polygonal rotor may be used instead of the rotating disk, the stirrer may have a different configuration, and the stirrer may be attached to the lower end of the rotating shaft extending downward from the top of the case coaxially with the rotating shaft of the rotating disk. . An embodiment prepared using the assembly coating apparatus of the present invention will be described below in comparison with a comparative example.

EXAMPLE

12 kg of acetaminopine and 2.3 kg of microcrystalline cellulose (brand name: AVISEL 101) and a total of 15 kg of 0.7 kg of cornstarch were fed to the assembly coating apparatus according to the present invention. The device has a diameter of 400 mm and a height of 2000 mm. The rotational speed of the rotating disk is 200r.pm, the rotational speed of the stirrer is 300r.pm and the temperature of the slit air or gas is 80 ° C, and the flow rate of the slit gas is 3Nm ³ / min. The gas temperature through the vent is 80 ° C., and the flow rate is 45.5 Nm ³ / min. 4.5 liters of 8% solution of hydroxypropyl cellulose (trade name: HPC-SL) was sprayed as a granulation binder. In this example, a good granular product with good particle size distribution and low segregation was obtained, and the assembly and drying operations were completed in 35 minutes.

Comparative Example 1

For comparison, other experiments were carried out using another conventional device in which a mesh was installed in all parts below the rotating disk except for the penetration of the rotating shaft. In this comparative experiment, the rotating speed of the rotating disk is 200r.pm, the temperature of the gas supplied through the mesh is 80 ° C, and the flow rate of the gas is 8.5Nm ³ / min. However, in this comparative example, the granulated product obtained when the total amount of the raw material was 15 kg was coarse, which was undesirable. Therefore, under the same conditions, when the total amount of the raw material was reduced to 12 kg and 3.6 L of 8% solution of hydroxypropyl cellulose was injected as in the above example, a granulated product of good quality was obtained and the time required for assembly and drying. Was 42 minutes, which took 7 minutes longer than in the above example.

Comparative Example 2

For a further comparison, an apparatus was used in which an air slit was installed between the outer circumference of the rotating disk and the inner wall of the case, and the bottom of the case consisted of a rotating disk without a vent. The rotational speed of the rotating disk was 200 r.pm, the temperature of the slit air was 80 ° C., and the flow rate of the slit gas was changed in the range of 3 to 8.5 Nm ³ / min. However, when the total amount of material was 15 kg, satisfactory products were not obtained because the particles were too coarse at any gas flow rate in the range of 3 to 8.5 Nm ³ / min. Therefore, the total amount of material was reduced to 10 kg, and the rotational speed of the rotating disk was supplied at a flow rate of 4.5 Nm ³ / min at 200 r.pm and 80 ° C. Also in this comparison, when 3 L of 8% solution of hydroxypropyl cellulose was sprayed as in Example, a granulated product having a good particle size distribution and less segregation was obtained, and the time required for granulation and drying was 50 minutes.

The results obtained in the above experiments are shown in Tables 1 and 2.

TABLE 1

10 is a cross-sectional view showing another embodiment of the assembly coating apparatus according to the present invention.

Since the basic structure of this embodiment is similar to the embodiment of Figs. 1 and 2, corresponding parts and parts are denoted by the same reference numerals as in Figs. The vertical position of the rotating disk 5 and the stirrer 6 is fixed, and the rotating disk 5 and the stirrer 6 do not move up and down.

In addition, an annular ring 17 is provided on the inner wall of the case 1 slightly below the outer periphery of the rotating disk 5 as an annular slit forming means, and between the ring 17 and the outer peripheral edge of the rotating disk 5. An annular gap or slit 16 for supplying slit gas is formed. As shown in FIG. 11, the annular ring 17 has the slit formation surface 17a which is a form of the inclined surface extended upwards. The slit formation surface 17a is inclined in the same direction as the direction of the slit formation surface 5a of the outer periphery of the rotating disk 5 inclined downward toward the center of the case 1. Thus, the two slit forming surfaces 5a and 17a are parallel to each other to form the slit 16 outwardly between the two surfaces.

The slit forming ring 17 of this embodiment can adjust the width of the slit 16 within the range of 0 to 10 mm by changing the vertical position of the ring with respect to the rotating disk 5. That is, the annular ring 17 itself is moved up and down using the slit adjustment device 60. The slit adjustment device 60 is a slot 61 in the form of an elongated through hole (Fig. 12) formed in an oblique direction through the wall of the case 1 at the position where the annular ring 17 is installed, and the slot 61. Inserted radially through the inner end thereof and screwed into the annular ring 17, as shown in FIG. 12, by the distance S from the two-dot chain line position to the one-dot chain position beyond the solid line position as shown in FIG. A sliding shaft 62 which is slid along the longitudinal direction of the slit, and a slot 61 in contact with the outer surface of the case 1 at the inner end thereof when screwed to the outer end of the sliding shaft 62 and screwed thereto. It consists of a fixing means or a fixing handle 63 that can fix the sliding shaft 62 to the required position along the longitudinal direction of the.

The slot 61 of this embodiment is inclined upward to the right as shown in FIG. Therefore, when the annular ring 17 is located in the left position 62a of FIG. 12, the annular ring 17 is located in a lowermost position, and the width or distance of the slit 16 becomes the maximum state. On the contrary, when the slide shaft 62 is moved to the dashed-dotted position 62b of FIG. 12, the width thereof is at a minimum (zero in this embodiment), and in this case the annular ring 17 is at the top position. The flow rate of the slit gas is minimized (in this embodiment, the slit gas flow rate is configured to be zero).

As described above, the slit gas flow rate such as heating or cooling air injected into the upper portion of the case 1 through the slit can always supply an optimum flow rate during the assembly coating operation by adjusting the width of the slit 16.

In addition, the seals 64 and 65 of FIG. 11 are for preventing external air from entering the case 1 through the slit 16 and the space between the outer periphery of the annular ring 17 and the inner surface of the case. .

In addition, in this embodiment, the grinder 38 provided horizontally in the case 1 from the outer side in the position on the outer side area | region of the stirrer 6 is provided.

As shown in FIG. 13, the grinder 38 has a grinder shaft 40 rotated by an electric or air motor 39, and a plurality of grinding blades 41 protruding outward radially on the outer surface of the shaft 40. It consists of). The grinding blade 41 is rotated on the needle bed of the material to be assembled coated spirally swinging along the inner wall of the case 1 by the rotation of the rotary disk 5 and the stirrer 6, and the grinding blade 41 or the grinding shaft ( The rotation of 40 is very fast and for example faster than the rotation of the rotating disk 5 and the stirrer 6.

Therefore, particle size control, mixing, dispersing and pulverizing and assembly are performed in addition to the rocking and granulation coating action by the rotating disk 5 and the stirring and mixing kneading action by the stirrer 6. Accordingly, it is possible to assemble and coat the product with high productivity by various complex actions. That is, since the grinding blade 41 is provided, the granulation coating is performed while the coarse particles formed on the needles of the powder or granule material are separated into particles of the desired size by the shearing force of the grinding blade 41.

In addition, a dust collector such as a bag filter or a cyclone is installed on the upper part of the case 1. However, in the present embodiment, the grinder 38 is installed so that the powder or granule material to be granulated and coated is supplied into the case 1 and sufficient binder or coating material is supplied to prevent the fine powder from escaping, and then the granulation or coating is performed. The work is performed. Therefore, this embodiment has the advantage that it is not necessary to install a dust collector. The operation sequence of this embodiment is described as follows.

First, the powder or granule material to be assembled coated is charged into the case 1 through the chute 2.

Next, the gas control valve 34 is opened to independently regulate the gas flow rate through the conduit 32 so that the gas of the supply fan 26 passes through the vent 18 of the rotating disk 5 to the case 1. Allow it to enter inside. The slit 16 is then fixed in the required position.

That is, formed between the slit forming surface 5a of the outer periphery of the rotating disk 5 provided in the bottom of the case 1 and the slit forming surface 17a of the annular ring 17 mounted on the inner wall of the case 1. To adjust the width of the slit 16 to the selected distance, the fixing handle 63 of the slit adjusting device 60 is released so that the sliding shaft 62 is appropriately clockwise or counterclockwise along the longitudinal direction of the slot 61. Make sure that you slide to the position.

In this way, the annular ring 17 is slid along the inner wall of the case 1 together with the sliding shaft 62 to adjust or change the width of the slit 16. Therefore, when the width of the slit 16 is an appropriate degree, the inner end face of the fixing handle 63 is formed on the outer surface of the case 1 by rotating the fixing handle 63 so that the sliding shaft 62 is screwed into the fixing handle. In close contact with the annular ring 17 is fixed at an appropriate height.

In this way, after the width of the slit 16 is fixed in such a manner that the width of the slit 16 is fixed to an appropriate size, the required direction is obtained by rotating the rotary shaft 7 through the belt 9 by the motor 8. And rotate the rotating disk at a speed. At the start of the assembly operation, the gas flow control valve 34 and the slit gas control valve 33 are introduced to flow gas from the supply fan 26 into the case 1 through the slit 16 and the ventilation opening 18. It is opened to provide a predetermined gas flow rate to prevent the raw material in the case 1 from falling.

After that, the agitator 6 is rotated in the same or reverse direction with respect to the rotating disk 5 by the motor 12 by the belt 13 and the rotating shaft 11 at a required speed. Then, the powder or granule material is supplied into the casing 1 through the supply chute 2 by a predetermined amount to assemble the material, while pumping the binder or coating solution from the tank 42 by the pumps 43 and 44 to spray nozzles. Spray onto a bed of material through one or both of 45 and 46. If necessary, a predetermined amount of powder or granular material may be supplied to the material needle using the nozzle 47. Exhaust gas introduced through the material needle is discharged along the exhaust conduit 48.

According to the assembly coating apparatus of this example, the combined flow of the rotary disk 5 and the stirrer 6 and the combined flow of gas through the slit 16 and the vent 18 through the slit 16 during the operation. The powder or granule material is rotated and suspended. As a result, the raw materials are stirred, mixed, centrifugal and rotational to flow, causing the material to float due to the gas flow and descending by gravity. Thus, as shown in FIG. 14 and FIG. 15, the powder or granule material forms a rocking needle bed 50 of the material which is caused to spirally swing around the inner wall of the case 1.

For example, the grinding speed of the rotary disk 5 in the same direction as the material rotation direction of the needle 50 (which is the rotational direction of the rotary disk 5) at a rotational speed higher than that of the needle 50. By rotating the grinding blade 41 of 38) on the needle bed 50, the large particle material of the needle bed 50 is subdivided by the rotational shear force of the grinding blade 41 to promote assembly, and FIGS. 14 and 15 As indicated by the dashed arrow 51 in the figure, it is distributed toward the center of the case 1 to obtain better subdivision and mixing action.

Therefore, according to this embodiment, two gas flows consisting of the combined rotational movement of the rotating disk 5 and the stirrer 6, the slit gas supplied through the slit 16 and the gas supplied through the vent 18 It is possible to easily obtain granulated coated particles having a narrow particle size distribution of high productivity by the subdivision, mixing, dispersing, and particle homogenization action obtained by the pulverizing blade 41 of the crusher 38 together with the combined movement of.

According to the present invention, since the vertical position of the annular ring 17 can be easily adjusted to adjust the width of the slit 16 at an appropriate distance as described above, good assembly coating can be performed by the slit gas at the optimum flow rate. In any step of the assembly coating, the slit gas flow rate flowing into the case 1 through the slit 16 can be adjusted to an appropriate flow rate.

Also, in this embodiment, the annular ring 17, which does not rotate in place of the rotating disk 5, is moved vertically for the same purpose as compared to the device for moving the rotor vertically to adjust the slit 16 width. Because of the structure, the structure of the slit adjusting device 60 is simpler than the case of moving the rotor vertically, the manufacturing cost is low, and the operation is easy.

Moreover, in the present embodiment, by providing the grinder 38, the rotary disk 5, the stirrer 6, and the grinding blade (with the binder or coating solution supplied to the powder or granular material charged in the case 1) It is possible to carry out the assembly coating work by mixing and kneading 4). As a result, the assembly coating speed is gradually accelerated, and dispersion of fine particles in the case 1 is prevented to obtain a uniform product without component segregation.

Therefore, it is not necessary to provide a bag filter inside the case 1 by the effect of suppressing fine dispersion. Of course, in some cases, a simple cyclone may be installed outside the case 1. Therefore, since there is no bag filter that is difficult to completely clean, the assembly or coating apparatus is inexpensive, high in efficiency, and easy to operate.

In addition, when the bulk density of the powder or granular material is high, for example, a material such as ceramic, metal powder or ferrite, it is impossible to restart it once the flow state is stopped for any reason in the conventional apparatus. However, in this example, the flow of the stirrer 6, the pulverization blade 41 and the rotating disk 5, and the flow of the slit gas and the gas flowing through the vent 18 can be resuspended.

In addition, according to the present embodiment, since the grinder 38 is provided, particles of a smaller size can be obtained, and the particle size of the product can be easily adjusted by changing the rotational speed of the grinding blade 41. That is, relatively large particles can be obtained when the grinding blade 41 has a low rotational speed, and fine particles can be obtained when the rotational speed is high.

The combined coated effect of the rotating disk 5 and the stirrer 6 quickly releases the coated product through the chute 3. Also, as shown in FIG. 16, the slot 61 of the slit adjustment device 60 is inclined counterclockwise right upward in a plane with respect to the circumferential direction of the case 1 similarly to the above embodiment. And when the sliding shaft 62 is in the right position 62b shown by the dashed-dotted line in the figure, the annular ring 17 is in the uppermost position, and the gap between the slit forming surfaces 5a and 17a is minimized. The slit gas flow rate into the case 1 is minimum (in this embodiment, the slit forming surfaces are in contact with each other so that the slit 16 width becomes 0 and there is no slit gas flow rate).

When the sliding shaft 62 is located at the double-dashed line position 62a, the annular ring 17 is located at the lowest position to maximize the slit 16 width. Of course, the inclination direction of the slot 61 may be reverse to that shown in FIGS. 12 and 16. In the case of this embodiment, the width of the slit 16 is simply and easily adjusted by the slit adjusting device 60 so that it is always kept in an optimal state. In FIG. 17, the slot 61a of the slit adjustment device 60 is comprised by the vertical slot which linearly moves in the vertical direction of the case 1. As shown in FIG.

Therefore, in this example, the higher the position of the sliding shaft 62 along the slot 61a, the narrower the width of the slit 16, and the flow rate of the slit gas is reduced. On the contrary, the lower the position of the sliding shaft 62, the larger the width of the slit 16 is, thereby increasing the flow rate of the slit gas. The sliding shaft 62 can be easily vertically moved within the distance S range. In FIG. 17, the shaft 62 is fixed at an appropriate position by the fixing handle 63 of the slit adjustment device.

The present invention is not limited to the above-described embodiment, it will be appreciated that anyone in the art can make many other variations. For example, the annular ring or slit adjusting device or the like may have a different configuration than that described in the above embodiment, which may be partially or fully automated. It is also possible to use a disk-shaped rotating plate such as a polygonal plate instead of the rotating disk. Various slit adjusting devices may be presented, and may be manufactured as a plate-shaped ring of slit forming ring or annular ring.

The present invention may be used for operations such as mixing and drying in a single operation or in combination with other operations.

Claims (13)

A granulation coating apparatus for use in assembling, coating, mixing and drying of a powder or granule material composed of a case 1 containing a powder or granule material to be granulated coated and a rotating disk 5 rotated horizontally in the case. A vent 18 formed in a part of the disk 5, an annular slit 16 formed between the case and the outer periphery of the rotating disk 5 to supply slit gas into the case, and a gas supplied through the vent Assembly and coating apparatus, characterized in that provided with a gas flow rate adjusting device for independently controlling the flow rate and the slit gas flow rate supplied through the slit (16). According to claim 1, wherein the gas flow rate control device, the gas passage 32 for supplying the supplied gas through the ventilator 18, and the slit gas passage for supplying the supplied gas through the slit 16 (31), a partition (30) for separating the slit gas passage (31) and the gas passage (32) from each other, and gas flow rate regulating valves (33, 34) provided in each gas passage (31, 32). Assembly coating apparatus, characterized in that. 3. The assembly coating apparatus according to claim 2, wherein the gas passages (31, 32) are formed of annular gas passages separated by annular partitions (19, 20) under the rotating disk. The assembly coating apparatus according to claim 1, further comprising a stirrer (6) mounted on the rotating disk to rotate horizontally independently of the rotating direction and speed of the rotating disk. The assembly coating apparatus according to claim 4, wherein one or both of the rotating disk and the stirrer are configured to be movable in the vertical direction. 2. The annular slit forming ring according to claim 1, wherein the rotating disk 5 is movable in the vertical direction, and an inner wall of the case near the outer circumference of the rotating disk changes the width of the slit 16 by the vertical movement of the rotating disk. 17) Assembly coating apparatus characterized in that provided. 2. The rotating disk 5 is movable in the vertical direction, and upwards or downwards so that the inner wall of the case near the outer circumference of the rotating disk can change the width of the slit 16 by the vertical movement of the rotating disk. Assembly coating apparatus, characterized in that extended to. An annular ring (17) for fixing the slit (16) together with the outer circumference of the rotating disk, fixed to the vertical position of the rotating disk, and close to the outer circumference of the rotating disk. Assembly coating apparatus characterized in that the slit adjustment device (60) for moving the annular ring (17) in the direction of changing. 9. The slit forming surface (17a) according to claim 8, wherein the annular ring (17) is located at the same position as the rotating disk or above or below the rotating disk, and forms a slit together with the slit forming surface (5a) of the rotating disk. Assembly coating apparatus, characterized in that provided with. 9. The slit adjusting device (60) according to claim 8, wherein the slit adjusting device (60) includes at least one slot (61) formed in the case wall, and an inner end portion inserted into the slot to move along the slot and to which the annular ring (17) is attached. Assembly shaft coating device, characterized in that consisting of a fixed handle (63) for fixing the annular ring to a predetermined position. 11. The assembly coating apparatus according to claim 10, wherein the slot (61) is inclined with respect to the inner wall of the case. The assembly coating apparatus according to claim 10, wherein the slot (61) is formed in a direction perpendicular to the inner wall of the case. 5. The assembly coating apparatus according to claim 4, wherein the stirrer (6) is attached to the lower end of the rotating shaft extending downwardly from the top of the case coaxially with the rotating shaft of the rotating disk.

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